Loom.



J. F. DUSTIN.

' LOOM.

APPLICATION FILED SEPT. 6, 1911.

1-, 1 1 2, 36 6 ted Sept. 29, 1914.

2 SEEET88HEET 1.

@ 66 .z zas' 70,

721'; NORRIS PETERS 60.. PHom-LITHQ, WASHINGTON, D. C

J. F. DUSTIN.

LOOM.

APPLICATION FILED saw. a, 1911.

1 ,1 12,366. Patented Sept. 29, 1914.

2 SHEETS-SHEET 2.

UNITEDSTATES PATENT OFFICE.

JOHN F. DUSTIN, 0F FULTON, NEW YORK.

LOOM.

Specification of Letters Patent.

Patented Sept. 29, 1914.

Application filed September 5, 1911, Serial N 0. 647,790.

To alien/ 1 0117, it may concern Be it known that I, JOHN F. DUSTIN, acitizen of the United States, residing at Fulton, county of Oswego,State of New York,

have invented an Improvement in Looms, of

which the following description, in connection with the accompanyingdrawing, is a specification, like characters on the drawing representinglike parts.

This invention relates to looms and particularly to looms of that typeemploying a shifting shuttle box, and the object of the invention is toprovide a novel loom stopping mechanism which is rendered operativewhenever the shifting shuttle boxes bring a shuttle into operativeposition at a time while another shuttle is also in operative positionon the lay. a

In the operation of a drop box loom 1t sometimes happens that throughfaulty mechanism the shifting shuttle boxes will bring a shuttle intoposition to be thrown across the lay by the picking mechanismwhile theshuttle which has previously been in operation is still occupying aposition on the lay or is boxed at the opposite end of the lay, and whenthis condition arises the presence of two shuttles in position on thelay will cause a smash or some other injury to the loom or fabric beingwoven.

My invention aims to prevent such a,

catastrophe by providing means for stop ping the loom whenever twoshuttles are sm'iultaneously in position to be thrown' across the lay bythe picking mechanism.

I have. illustrated herein a construction embodying my invention whichwill demonstrate the principle thereof, it being understood, of course,that the constructional details may be varied without departing from theinvention.

Figure 1 is a vertical section through a loom having my improvementsapplied thereto. Fig. 2 is a sectionon the line ww,

Fig. 1, showing the lay and the harnesses in front elevation; Fig. 3 isa view showing, the operation of the loom-stopping m'echanism; Fig. 4shows the vshuttle detecting mechanism; Fig. 5 is a detail view of a;

portion of the knock-off mechanism.

I have shown in the drawings a loom having a frame 1, a breast beam 2, alay 3 which is supported on the lay swords 4, a

crank shaft 6 which is connected to and which operates the lay through aconnecting rod 7 a shipper lever 8, and a knock-off lever 9. These partsare or may be of any well-known construction and as they form no part ofthe present invention I do not deem it necessary to give anyfurtherdescription thereof.

The loom shown is ofthe drop box type 1 and the lay3 has at one end ashuttle boxlO provided with the usual binder 11 and at the other end aset of shifting shuttle boxes 1 12, each of which is also provided witha binder 13. As stated above, it 'sometinies happens in the operation ofa loom of this type that the shuttle boxes will bring a shuttle 14L intoposition to be thrown across the lay 3 while another shuttle 15 is stillboxed in the shuttle box 10, and when this occurs the presence of eithershuttle in its shuttle box will, of course, prevent the other shuttlefrom being properly boxed when it is thrown across thelay,and thefailure of open at two points, means to close the circuit duringthemovement of the lay at one point when the shuttle is boxed in theshuttle box 10 and at the other point when a shuttle is boxed in one ofthe shifting shuttle boxes, so that the circuit will be completelyclosed whenever a shuttle occupies each of the shuttle boxes, as shownin Fig. 2, and

. means operated by'the closing of the circuit to actuate the knock-offlever stop the loom. v y

'17 designates the usual protector rod which is provided with thefingers 16 that engage thebinders l1 and 13 respectively. Looselymountedon the protector rod 17 at 9 thereby to each end thereof is a shuttledetector inthe .form of an arm 19 provided with a portion 18 that isadapted to engage the binder 11 ory13. Each shuttle detector 19 is actedon by a spring 20 which encircles the protector rod and operates to holdthe detector against the binder. Each detector 19 carries at its lowerend a wiper contact 21, said contacts being insulated from the otherparts of the loom in some suitable way. As herein illustrated eachcontact is provided with a stem 22 which enters and is secured to asleeve 23 of insulating material that in turn is secured to a projection24 rigid with the detector arm 19.

Each contact 21 cooperates with a pair of contacts or terminals 25 thatare insulated from each other in some suitable way as by being sustainedby a, support 74 of insulat ing material, (but are situated in anelectrical circuit of the loom-stopping mechanism. As herein shown onecontact of one pair of contacts 25 is connected to or grounded on theloom frame by a wire 26 and the other contact of said pair iselectrically connected to one of the contacts 25 of the other pair by awire 27. The other contact of said latter pair is connected by a wire 28to a magnet 29, and the latter is connected by a wire 30 to a battery 31or other source of electrical energy, said battery being, connected inturn to the loom frame.

i The wiper contacts 21 are carried by the lay and therefore during themovement of the lay they pass over the contacts 25. The construction issuch, however, that neither contact 21 will engage its contact 25exceptwhen a shuttle is in the box. Nhen there is noshutltle in the boxand the binder consequently is in its inmost position the spring 20 willthrow the shuttle detector forwardly into the full line position, Figs.1 and 4, and thus carry the corresponding contact wiper 21 into suchaposition that it will pass over the contacts as the lay vibrateswithout engaging said contacts. hen a shuttle enters the box, however,said shuttle will force the binder outwardly thereby swinging thedetector arm 19 into the position shown by dotted lines Figs. 1 and 4,and when the arm 19 occupies this position the contact 21 is thrown intosuch a position that it will contact and have a wiping engagement withthe contacts 25 when the lay moves backwardly. From the above it will beseen that during the normal operation of the loom first one contact 21and then the other is brought into engagement with the contacts 25 asthe Since the circuit is closed al ternately at the contacts 25,however, the loom-stoppingmechanism does not operate under ordinarycircumstances. If, however, for any reason a second shuttle 14 is layvibrates.

brought into operative position While the shuttle 15 is still in the box10, then upon the next operation of the lay thecircuit will be closed atboth pairs of contacts 25, and

when this occurs the magnet 29 is energized thereby to operate theknock-off lever 9 and thuseifect the stopping of the loom.

Various mechanisms may be employed for operating the knock-off lever 9when the magnet 29 becomes ener ized. As herein shown the armature 32for said magnet is carried by a lever 33 which is pivoted at 34 to anarm or bracket 85 that is carried by the loom frame and preferablyinsulated therefrom. The lever 33 has connected to one end thereof alinkuSG which is also connectcd to a. lever 37 that is pivoted at 38 toa longitudinally-extending rod or member 39 which is connected at 40 toan arm 41 and operates in a. guide 49. This arm is pivoted to the loomframe at 42 and is adapted to engage the knock-off lever 9.

43 is a dog which is pivoted at 44 to the bar or member 39, said doghaving a nose 45 which is adapted to be engaged by an cxtension 46formed on the end of the lever Said dog is also provided with a tailwhich is adapted to be engaged by a hook fast on one of the law swordswhenever the loom-stopping mechanism is operated.

Under normal. conditions when the magnet is deencrgized, the weight ofthe parts holds said parts in the position shown in Fig. 1, in whichposition the tail 47 of the dog is below the path of movement of thehook 48 so that during the vibration of the lay said hook does notengage said tail. lVhenever the magnet 29 is energized, however. thearmature 32 will be drawn down- "ardly, thus swinging the lever 33 andraising the lever 37, which operation causes the extension 46 to actagainst the nose 45 of the dog thereby to swing the tail of the dogupwardly into position to be engaged by the hook 348, as seen in Fig. 3.The dog is so situated that when the tail thereof is raised the hook 48will engage said tail just after the lay begins its rearward movement,and the engagement of said hook with the dog will draw the member 39backwardly, thus operating the knock-off lever and stopping the loom.The dog is so situated that this operation of stopping the loom willoccur before the shuttles are thrown, or at least before the lay beatsup again, so that there is no danger of a smash occurring.

While it would be within my invention to connect the battery 31 directlyto the loom frame, yet I prefer to interpose in the circuit anadditional circuit breaker which will maintain the circuit open duringthe forward movement of the lay so as to prevent the circuit from beingclosed by the contacts 21 except when the lay is moving ba'ckwardly.This additional circuit closer is shown as a wiper 50 fast on the crankshaft 6 and adapted to engage a spring contact 51 which is connected bya wire I with the battery 31, said contact being carried. by the loomframe, but insulated thcrefrom. as at 53. The wiper 50 has asemicircular shape and is so arranged on the shaft that it will beinengagement with the contact 51 when the lay is moving backwardly, butwill be disconnected from or out of engagement with said contact whenthe lay is moving forwardly. Fig. 1 shows the crank shaft 6 on the backcenter with the wiper 50 just passing oft from the contact 51. Themember 37 is shown as having a projection 56 which is adapted to be enbya lug 5'!" on the lay sword when said member is raised by theenergization of the magnet 29. I provide this construction so as toinsure that the loom will be stopped if for any reason the hook 48 doesnot engage or slips off from the dog 43.

designates heddle frames of ordinary construction.

From the above it will be seen that I have provided a simple mechanismfor stopping the loom whenever two shuttles accidentally come to occupyoperative positions on the lay, and while I have illustrated herein oneembodiment of the invention I do not wish to be limited to theconstructional features shown. Q

I-Iaving fully described my invention, what I claim as new and desire'tosecure by Letters Patent is 1. In a loom, the combination with a layhaving two shuttle boxes, of a shuttle detector associated with eachshuttle box and arranged to occupy one position when a shuttle is in thebox and another position when the box is empty, each shuttle detectorhaving a wiper contact associated therewith, which contact moves in onepath when a shuttle occupies the corresponding box and in another pathwhen there is no shuttle in the box, an electric circuit having twopairs of separated stationary contacts, each pair of stationary contactsbeing situated to be engaged by the corresponding wiper contact when itmoves in the first-named path, and means to stop the loom when thecircuit is closed simultaneously by both wiper contacts.

2. In a 100111, the combination with a lay having at each end a shuttlebox provided with a binder, of a shuttle detector adjacent each shuttlebox and operated by the binder thereof, a wiper contact associated witheach shuttle detector and situated beneath the lay, each wiper contactmoving in one path when a shuttle occupies the corresponding box and inanother path when there is no shuttle in the box, an electric circuithaving two pairs of stationary contacts situated to be engaged by thewipers when they move in the first-named paths, and means to stop theloom when the circuit is closed simultaneously at both pairs ofcontacts.

3. In a loom, the combination with a lay having at each end a shuttlebox provided with a binder, of a shuttle detector pivoted to the layadjacent each shuttle box, each ing wiper contact in position'to engagethe stationary contacts as the lay vibrates, and means to stop the loomwhen the circuit is closed simultaneously at both pairs of sta tionarycontacts.

4. In a loom, the combination with a lay having two shuttle boxes, of ashuttle detector associated with each shuttle box, a normally-opencircuit having two pairs of separated. stationarycontacts, a wipercontact carried by each detector, each detector when actuated by ashuttle in the corresponding shuttle box moving its wiper contact intoposition to engage the corresponding pair of stationary contacts as thelay vibrates, and means to stop the loom when the circuit is closed atboth pairs of stationary contacts simultaneously.

5. In a loom, the combination with a lay having a shuttle box at oneend, of shifting shuttle boxes at the other end, a knockoil lever, amember connectedthereto and extending beneath the lay, a dog pivoted tothe member, a hook rigidly carried by the lay, and means to move saiddog thereby to bring it into the path of the hook whenever the shiftingshuttle boxes bring a shuttle into operative position while anothershuttle is also in operative position.

6. In a loom, the combination with a lay having a shuttle box at oneend, of shifting shuttle boxes at the other end, a hook movable with thelay, a knock-oft lever, a member connectedthereto and extending bencath.the lay, a dog pivoted to said memher and normally occupying a positionout of the path of movement of said hook, and

means to throw said dog into the path of movement of the hook wheneverthe shifting shuttle boxes bring a shuttle into operative position whileanother shuttle is also in operative position, said dog being so positioned as to be engaged by the hook when the lay begins its backwardmovement.

7. In a loom, the combination'with a lay having a shuttle box at oneend, of shifting shuttle boxes at the other end, a knoclcofi' lever, amember connected thereto, a dog pivoted to said member, a hook carriedby the lay, a shuttle detector associated with each shuttle box, anormally-open circuit having two pairs of separated stationary contacts,a wiper contact carried by each shuttle detector, each detector whenactuated by a shuttle in the corresponding shuttle box moving its wipercontact into posi- & 1,i12,366

tion to engage the corresponding pair of staname to this specification,in the presence tlonary contacts as the lay vlbrates, and of twosubscribing wltnesses. means to move said dog thereby to bring 1t intothe path of the hook When the circuit JOHN DUSTIN 5 is closed at bothpairs of stationary con- \Vitnesses:

tacts simultaneously. LOUIs 0. SMITH,

In testimony whereof I have signed my FREDERICK S. GREENLEAF.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatents, Washington, .D. O.

